I'm using 440 in a challenger (R/T hood) with performer rpm manifold and a eddie 800avs, must use drop base air filter and even then you must be careful of the height of the air cleaner stud-nut. And thats with a .25" thick gasket. From what I understand, if you use a performer manifold, or a holley SD the stock one fits.

Height with the eddie 800avs, or a holley DP carb was the same as I had a holley carb before.

Something to consider - vapor lock. With this manifold, there is no room to run a thick gasket to insulate carb from heat. Wish I went with the holley SD manifold instead.